Drum for a hoisting device



June s, 1933. w ,1 HUMMEL Er AL 1,912,483

DRUM FOR A HOISTING DEVICE Filed Dec. 2s, 1928 3 sheets-sheet '1 9 2 5 P NF L l 1 L /nm my 5l if /8 29 Z8 Il'.

June 6, 1933. w. A. HUMMEL Er A'.

DR-UM FOR A HOISTING DEVICE 3 Sheets-Sheet Filed Dec. 28. 1928Y June 6, 1933. w. @HUMMEL Er AL 1,912,483

Patented June 6, 1933 UNITED STATES PATENT OFFICE VJILLARI) A. HUMMEL AND EARL R. JONES, OF PHILADELPHIA., PENNSYLVANIA,

ASSIGNORS T AIVIERICAN ENGINEERING COMPANY, 0F PHILADELPHIA, PENNSYL- VANA, A CORPORATION OF PENNSYLVANIA DRUM FOR A HOISTING DEVICE Application filed December 28, 1928.

Our invention relates to winding drums, and it has for one object the provision of a winding drum of simple and compact construction, that is particularly applicable to hoisting apparatus.

Another object of our invention is to provide a winding drum of maximum strength but minimum .veight, wherein the parts are formed of pressed-metal.

Still another object of our invention is to provide a drum, wherein the uniform winding of the cable thereon'is assured under all normal operating conditions, our invention conten'iplating a structure wherein the winding'surfaces are offsetso as to form ashoulder therebetween, insuring the winding of the cable on said surfaces in desired sequence.

A further object of our invention is to provide simple and eiiicient means, whereby a driving shaft may be rigidly secured to a drum construction formed of relatively thin pressed-metal plates positioned in direct contact with the shaft.

A still `further object of our invention is l.to provide a drinn with a socket which is adapted to receive a locking element secured to one end of the hoisting cable, the locking element being removable from the socket upon a predetermined angular movement thereof about different axes.

Vith these and other objects and applications iii mind, our invention further consists in the details of construction and operation and arrangement, hereinafter set forth and claimed and illustrated in the accompanying drawings,wherein Fig. 1 is a transverse sectional View of a hoist embodying our invention, taken on the line 1 1 of Fig. 2.

Fig. 2 is a longitudinal sectional view, taken on the line 2 2 of Fig. 1, showing particularly the position of the drum with respect to the driving motor and the center frame of the drum hoist-ing;

Fig. 3 is an enlarged detail, top plan view of the hoisting drum shown in Fig. 1;

Figs. 4 and 5 are detail views, showing two positions of the locking lug;

Fig. 6 is a detail sectional view taken on Serial No. 329,058.

the line 6 6 of Fig. 8, showing the final position of the locking lug; and

Fig. 7 is a sectional perspective view on the line 7 7, Fig. 6.

In order to illustrate more clearly the fundamental features of our invention, we have shown the same applied to a hoisting device of the character set-forth in the application of Earl R. Jones, Serial No. 329,040, iiled December 28, 1928 and assigned to the American Engineering Company, though, of course,

our invention is capable of other applications. The hoist therein shown comprises broadly a pressure-steel trolley frame 1 which is provided with pairs of supporting wheels' 2 and 8 mounted on a track formed by an I- beam 4; a pressed-steel hoist body portion 5 which is mounted on the trolley frame 1 by means of a pivot bolt 6; and a pair ofl pressedsteel current collectors 7 and18 adapted to coact with conductors 9 and 11, respectively.

The main body portion of the hoist comprises a central frame 12 of oval form provided with a central opening13 on a bottom side thereof, through which a cable 14 and hook 15 may pass. The central frame 12 has secured to its edges a pair of side plates 16 and 17, so that a closed drum chamber 18 may be formed. A motor 19 is mounted in the side plates 16 and 17 and extends transversely through the chamber 18. A pressedsteel drum 21 for the cable 141 is also mounted in the chamber 18 on a shaft 22 extending through and mounted in the side plates 16 and 17. As shown in Fig. 2, the position of the drum in the chamber 18 is such that a side portion 23 of the motor 19, as well as an adjacent side portion 241 of the frame 12, tends to prevent the cable 14s from becoming disengaged froiii the drum 21 under normal conditions of operation, all as will presently appear in greater detail.

Considering the drum 21 in greater detail, a pair of pressed-steel side plates 25 and 26 are formed as shown in Figs. 1, 2 and 3, coniprising hub portions 27 and 28, web portions 29 and 31, and cable-engaging peripheral portions 82 and 38, respectively. The web portions 29 and 31 comprise oppositely dished inner portions 84 and 35 and outer abutting peripheral portions 36 and 37, respectively. Inner edges of the dished portions 34 and 35 are provided with outwardly-extending flanges 38 and 39, so as to form the hub portions 27 and 28, respectively, of the drum 21. The flanges 38 and 39 are provided with a plurality of flat sides 41 which are formed complementary to a plurality of axially-extending flat sides 42 on the drum shaft 22.

In assembling these parts, the shaft 22 is inserted in the central opening in the drum 21, so that the flat sides 42 thereof lit tightly against the flanges 38 and 39 forming the drum hub portions 27 and 28. The parts may be further secured in position by welding the edges of the flanges 38 and 39 to the shaft 22. Such method of securing the drum 21 to the shaft 22 eliminates the necessity for the usual key-and-slot connection, and this is especially important in the pressed-steel drum 21 of the present invention in view of the thinness of the side plates 25 and 26.

The outer edge portion 36 of the side plate 25 is provided with a curved portion 43 which extends into a horizontal circular flange so as to form a cable-winding surface 45. rEhe edge of the horizontal flange 44 is projected radially outwardly and also slightly inwardly by means of a circular flange 46. The outer portion 37 of the remaining,r side plate 26 is provided with a portion 47 which is curved oppositely to the portion 43 of the side plate 25. The portions 43 and 47 thus define a circular cable groove 48, as shown in Fig. 3.

The portion 47 of the side plate 26 is continued outwardly beyond the flange 44 of the side plate 25 and terminates in a flange portion 49 which extends from the center of the drum 21 opposite to the flange 44 and which is offset with respect thereto, forming a shoulder 51 therebetween. The end of the flange portion 33 is continued radially outwardly by means of a flange 52 which is also folded slightly' toward the center-line of the drum 21 as in the case of the flange 46. The flange 49 thus affords a circular cable-winding surface 53 which is displaced outwardly with respect to the winding surface 45 and bounded at the outer edges thereof by the walls 46 and 52.

It is noted that the flanges 44A and 49 are of relatively short axial length, so that the cable 14 may be maintained approximatelf,T in the centerline of the drinn 21. The offsetting of the winding surfaces 45 and 53 assures the winding` of the cable 14 thereon in desired sequence` and also tends to prevent the formation of a shoulder in the cable 14 wound on the drum 21 such as would occur if the surfaces 45 and 53 were in alignment and the cable 14 were positioned first on one of the surfaces 45, 53 and then on both of the same.

Our invention embodies the further feature of a simple and efficient detachable connection between the end of the cable 14 and the drum 21. To this end, We secure a locking lug 54 on the end of the cable 14, and also provide a locking recess 55 in the drum 21. The first step in the formation of the locking recess 55 involves increasing the depth and width of the recess 48 to provide an enlarged portion 56, the sides 57 and 58 of which gradually converge into the circular recess 48. The enlarged recess portion 56 may be formed by pressing apart the curved portions 43 and 47, as well as web portions 36 and 37 adjacent thereof, as shown in Figs. 2 and 3. The final step involves the cutting away by stamping or otherwise of an inner, rear corner portion 59 of the enlarged recess 56, axially adjacent web portions 60 and 61, to provide an aperture ext-ending between the two sides of the drum 21 and forming therein the locking recess 55.

The recess 55 extends circumferentially beyond the inner end of the enlarged recess 56 in order to provide a shoulder 63 against which a long side 64 may rest. The recess 55 also extends inwardly into the oppositely flared web portions 34 and 35. As shown in Fig. 6, an upper side 65 of the recess 55 is substantially flat and is positioned at approximately right angles to the radius of the drum 21. A smooth abutting surface is thus afforded the upper side 64 of the locking lug 54. A front side 66 of the recess 55 is positioned at substantially right angles to the upper side 65 and affords an abutting wall for an inner end 67 of the locking lug 54.

The locking lug 54 is of such Width that when occupying its normal locking position shown in Fig. 2, it extends across the full width of the recess 55 and engages recessed portions 68 and 69 of the side Walls 57 and 58, respectively. The portions 68 and 69 thus prevent an outward circular movement of the locking lug 54 from the recess 55 and also an outward radial movement through opening 70 appearing in the circular Winding channel of the drum 21. The radial movement is also prevented by an end portion 71 of the locking lug 54 which is positioned in engagement with the shoulder 63 of the upper side 65 of the recess 55. The Width of the locking lug 54, however, is less than the length of the opening 70 in the winding channel, thereby permitting the insertion and removal of the locking lug 54 to and from the recess 55.

As shown in Fig. 4, the locking lug 54 is first inserted in the recess 55 through the opening 70 in the Winding channel, and is then turned 90 about an axis constituting a diameter of the drum 21, assuring the position shown in Fig. 5. The lug 54 is next turned about a 90 axis parallel to the drum axis into the final working position illustrated in Fig. 6. In this way, the connection between the cable 14 and the drum 21 is assured even though a slight twisting of the cable 14I should occur. However, the cable 14 may be Y tions having a transverse aperture `therequickly detached from the drum 21 merely by two successive 90 movements.

In operation, assuming the drum 21 to be unwound, the operation thereof in the hoisting direction results in the forming of superimposed layers of the cable 14 on the flange 44. If the winding operation continues, a layer of the cable 14 is positioned on the offset flange 49. Should for any reason the cable 14 tend to disengage from the hoist 21, this is prevented by reason of the guiding elf-ect of the portion 23 of the motor V19, as well as the guiding effect of the portion 24 of the center housing frame 12. In the event that the drum 21 is operated in the opposite direction and all the cable 14 is unwound therefrom, the separation of the cable 14 from the drum 21 is prevented by reason of the position of the locking lug 54 in the recess 55. The cable 14, however, may be quickly detached from the drum 21 merely by turning the locking lug 54 about successive axes spaced 90 apart.

While we have shown only one embodiment of our invention, for the purpose of describing the same and illustrating its principles of construction and operation, it is apparent that various changes and modifications may be made therein, without departing from the spirit of our invention. We desire, therefore, that only such limitations shall be imposed thereon, as are indicated in the appended claims or as are demanded by the prior art.

lVe claim z- 1. A drum provided with a circular channel adapted to receive a cable, said drum having a web portion and a hub portion, said channel being provided with an opening, said web portion being provided with a tra-nsversely-extending aperture, said cable hav ing a locking portion adapted to be normally positioned in said aperture and removable therefrom through said opening upon a predetermined angular movement thereof.

2. A drum for a hoist provided with a pair of side plates having adjacent edge portions, said edge portions having axially-extending flanges offset radially, adjacent edge portions of said plates being spaced circumferentially to provide a recess adapted to receive a cable, a corner portion of said recess being removed to provide a transversely-extending opening in the edge portions of said plates, said opening extending slightly beyond the end of said recess to form a shoulder, said cable being provided with locking means engageable with said shoulder and removable from said drum through said recessed corner portion upon a predetermined angular movement about different axes.

3. A drum comprising a pair of side plates, each having a central web portion and a lperipheral transverse lange,.wh1ch flanges form a cable-winding surface, said web porthrough adjacent said peripheralflanges, and said flanges havingl an opening extending into the said web aperture, said opening being greater in one dimension than in another, a cable. for said'drum provided at one end with a locking element adapted for insertionv through said opening and being greater in two'dimensions than the smaller dimension of the opening whereby angular adjustment ofY the element after insertion f about two separate axes provides a double interlock preventing accidental displacement of the locking element from the drum. A

4. A drum comprising a pair of pressed metal plates, each of said plates having a central lportion apertured for reception of a shaft, an intermediate transversely extending circular portion, and an outer portion in the form of a flange extending outwardly from the edge of said intermediate portiona part of the intermediate portion of one of said plates adjacent the flange being offset away from the centerlof the plate beyond the remaining part of the said intermediate portion, and the radial distance of said remaining part from the center of the shaft aperture of its plate being the same as the corresponding distance of the intermediate p0rtion of the other plate from the center of its shaft aperture, said plates being secured together in side-by-side relation with the said shaft apertures in axial alignment and with l the said intermediate plate portions forming a winding surface bounded by said flanges one end of which extending from one flange to a point beyond the junction line of the plates is of lesser diameter than the remainder of said winding surface.

5. A drum comprising a pair of pressed metal plates, each of said plates having a central portion apertured for reception of a shaft, an intermediate transversely extending circular portion, an outer portion in the form of a flange extending outwardly from the edge of said intermediate portion, a part of the intermediate portion of one of said plates adjacent the flange being offset away from the center of the plate beyond the remaining part of the said intermediate portion, and the radial distance of said remaining part from the center of the shaft aperture of its plate being the same as the corresponding distance of the intermediate portion of the other plate from the center of its shaft aperture, said plates being secured together in side-by-side relation with the said shaft apertures in axial alignment and with the said intermediate plate portions forming a winding surface bounded by said flanges one end of which extending from one flange to a point beyond the junction line of the plates is of lesser diameter than the remainder of said wind-` ing surface, and means for attaching a cable to the portion of lesser diameter immediately adjacent the inner edge of the said portion of greater diameter.

6. A drum comprising a pair of pressed metal plates, each of said plates having a central portion apertured for reception of a shaft, an intermediate transversely extending circular portion, an outer portion in the form of a flange extending outwardly from the edge of said intermediate portion, a part of the intermediate portion of one of said plates adjacent the flange being offset away from the center of the plate beyond the remaining part of the said intermediate portion, and the radial distance of said remaining part from the center of the shaft aperture of its plate being the same as the corresponding distance of the intermediate portion of the other plate from the center of its shaft aperture, said plates being secured together in side-by-side relation With the said shaft apertures in axial alignment and With the said intermediate plate portions forming a Winding surface bounded by said flanges one end of which extending from one flange to a point beyond the junction line of the plates is of lesser diameter than the remainder of said Winding surface, means for attaching a cable to the portion of lesser diameter immediately adjacent the inner edge of the said portion of greater diameter, said intermediate portions of the plates being apertured at the said junction line and adjacent the inner edge of the portion of the Winding surface of greater diameter for reception of a cable, and means for securing said cable in the said aperture.

WILLARD A. HUMMEL. EARL R. JONES. 

